You are genetic counselor, and a couple comes to you with concerns that if they have a child together, he or she could
have sickle-cell anemia. Genetic tests reveal that both the man and woman are carriers for sickle-cell anemia. How should
you advise them?
a. Half of their children will have sickle-cell anemia, and the other half will be carriers.
b. All of their children will have sickle-cell anemia.
c. There are no concerns, because none of their offspring have a chance of inheriting the sickle-cell allele.
d. While none of their children will have sickle-cell anemia, each child will have a 50% chance of being a carrier.
e. All of their children will have a 25% chance of having sickle-cell anemia.
ANSWER: e
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Strong chemical mutagens may be used to treat cancer cells. Is this a good or bad idea?
A. Good-kill those cancer cells as quickly as possible to cure the patient! B. Bad-these mutagens will also affect the non-cancerous cells, possibly leading to new cancerous states! C. Good and bad-they're very good at killing cancer cells, but depending on mode of administration, they could also be dangerous to non-cancerous cells. D. Bad-the cancer cells are already mutated. We don't want to mutate them more and make them more cancerous!
The osmoreceptors that the body uses to detect and react to situations such as dehydration are located
in the
a. hypothalamus. b. adrenal glands. c. efferent arteriole. d. kidneys. e. posterior pituitary.
If a chemical agent acted to make the nuclear envelope pores impermeable to the passage of hormones, what effect would it have?
A. Both steroid and non-steroid hormones would continue to be effective. B. Neither steroid nor non-steroid hormones would be effective. C. Non-steroid hormones would continue to be effective but steroid hormones would be ineffective. D. Steroid hormones would continue to be effective but non-steroid hormones would be ineffective.
Which of the following hormones is not involved in the male reproductive system?
A) LH B) progesterone C) testosterone D) FSH